F 2.1 Checking Sensor Operation - Omega Engineering CDE681 Series User Manual

3
I_
5 ohms
Between black wire and inner electrode Less than 5 ohms
Between black and red wires Infinite (open circuit)
Between black and white wires
Between red and white wires
Infinite (open circuit)
Infinite (open circuit)
Between red and inner shield wires Infinite (open circuit)
Between black and inner shield wires Infinite (open circuit)
Between white and inner shield wires Infinite (open circuit)
Between outer and inner shield wires
Infinite (open circuit)
4.
If you cannot get the required readings for one or more of the resistance
checks in step 3, the sensor is probably inoperative. Refer to OMEGA ' s
warranty/replacement plan for sensor replacement details. If all resistance
checks are okay, the sensor may still be inoperative. In this case, more
extensive troubleshooting is required. Please consult the OMEGA Customer
Service Department for details (see page 12).
11
23-27°C
Between red wire and sensor body Less than
m
2.1 Checking Sensor Operation
Use the troubleshooting section in the analyzer instruction manual to determine
whether the sensor or analyzer is in-operative. If you suspect the sensor, check it
using this procedure:
1. Disconnect the sensor from the analyzer (or junction box, if using interconnect
cable).
2. Clean the sensor using the procedure in Part Three, Section 1.
3. Using an ohmmeter, check all of the measurement point resistance readings
shown in Table A below.
Be sure that the ohmmeter is set to its highest range for all
infinite (open circuit) resistance readings shown in Table A.
Measurement Points Correct Resistance Readings
Between blue and white wires 1089-l 106 ohms at
2:14 PM Page11 7/17/03 M3S94m0603-CDE681Series.qxd